Security Bulletin
Summary
A vulnerability in ISC BIND could allow a remote attacker to poison the cache (CVE-2021-25220). AIX uses ISC BIND as part of its DNS functions.
Vulnerability Details
CVEID: CVE-2021-25220
DESCRIPTION: ISC BIND could allow a remote attacker to bypass security restrictions, caused by an error when using DNS forwarders. An attacker could exploit this vulnerability to poison the cache with incorrect records leading to queries being made to the wrong servers, which might also result in false information being returned to clients.
CVSS Base score: 6.8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/221991 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N)
Affected Products and Versions
Affected Product(s) | Version(s) |
AIX | 7.1 |
AIX | 7.2 |
AIX | 7.3 |
VIOS | 3.1 |
The following fileset levels are vulnerable:
Fileset | Lower Level | Upper Level |
bos.net.tcp.server | 7.1.5.0 | 7.1.5.35 |
bos.net.tcp.client | 7.1.5.0 | 7.1.5.40 |
bos.net.tcp.bind_utils | 7.2.4.0 | 7.2.4.3 |
bos.net.tcp.bind_utils | 7.2.5.0 | 7.2.5.2 |
bos.net.tcp.bind_utils | 7.2.5.100 | 7.2.5.101 |
bos.net.tcp.bind_utils | 7.3.0.0 | 7.3.0.1 |
Remediation/Fixes
AIX Level | APAR | SP |
7.1.5 | IJ40617 | SP11 |
7.2.4 | IJ40616 | N/A |
7.2.5 | IJ40674 | SP05 |
7.3.0 | IJ40614 | SP03 |
VIOS Level | APAR | SP |
3.1.1 | IJ40616 | N/A |
3.1.2 | IJ40615 | 3.1.2.40 |
3.1.3 | IJ41139 | 3.1.3.30 |
AIX Level | Interim Fix |
7.1.5.7 | IJ40617m9b.220718.epkg.Z |
7.1.5.8 | IJ40617m9b.220718.epkg.Z |
7.1.5.9 | IJ40617m9b.220718.epkg.Z |
7.2.4.3 | IJ40616m5b.220718.epkg.Z |
7.2.4.4 | IJ40616m5b.220718.epkg.Z |
7.2.4.5 | IJ40616m5b.220718.epkg.Z |
7.2.5.2 | IJ40615m4b.220718.epkg.Z |
7.2.5.3 | IJ40615m4b.220718.epkg.Z |
7.2.5.4 | IJ40615m4b.220718.epkg.Z |
7.3.0.1 | IJ40614m2b.220718.epkg.Z |
7.3.0.2 | IJ40614m2b.220718.epkg.Z |
VIOS Level | Interim Fix |
3.1.1.30 | IJ40616m5b.220718.epkg.Z |
3.1.1.40 | IJ40616m5b.220718.epkg.Z |
3.1.1.50 | IJ40616m5b.220718.epkg.Z |
3.1.2.10 | IJ40615m4b.220718.epkg.Z |
3.1.2.21 | IJ40615m4b.220718.epkg.Z |
3.1.3.10 | IJ40615m4b.220718.epkg.Z |
3.1.3.14 | IJ40615m4b.220718.epkg.Z |
3.1.3.21 | IJ40615m4b.220718.epkg.Z |
openssl dgst -sha256 | filename |
6c62ac5b0598ac3117445cfc5797aa6b85c4f527572e32d31d147849803b61ce | IJ40614m2b.220718.epkg.Z |
93bcac519d552563e6b4fa1f74712c6acf2b0c218d59be98dd1d8ad2cfcf3b21 | IJ40615m4b.220718.epkg.Z |
33b06edaae5964176f6c6d7ea58a97d2dbd142ee0817f56b16bcbb03b9a500d4 | IJ40616m5b.220718.epkg.Z |
199c9caa64e4fac6822e7ea11bde174cfddaaf00deb8ac294d86b9e512aed418 | IJ40617m9b.220718.epkg.Z |
Workarounds and Mitigations
None
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References
Acknowledgement
Change History
28 Jul 2022: Initial Publication
*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.
Disclaimer
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
Document Location
Worldwide
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Document Information
Modified date:
17 January 2024
UID
ibm16607880